Coniston Grits and Flags

Coniston Grits and Flags, a series of siliceous sandstones, grits, flags, and conglomerates, belonging to the Silurian system of Cumberland, &c. They take their name from Coniston in Lancashire, and attain a maximum thickness of probably not less than 7000 feet. They are characterised—the finer grained beds (flags) especially—by the presence of many species of graptolites and other fossils. They are believed to be on the same geological horizon as the Denbighshire grits and flags of Wales. See SILURIAN SYSTEM.